Szaporodásra nem, de a túlburjánzó vízinövényzet fogyasztására képes hal a triploid amur!
Amur

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A klímaváltozással járó felmelegedés következménye, hogy öntöző csatornáinkban, holtágainkban, halastavainkban és horgásztavainkban, vagy lassú átfolyású sekély tavainkban a korábban tapasztaltakhoz képest erősen felgyorsult a vízinövényzet elburjánzása. Ez nem csak az ember által végzett tevékenység, pl. a halászat, horgászat, vagy az öntözés szempontjából kellemetlen, hanem sok, korábban ott élő hal, vagy egyéb faj számára is komoly nehézségeket okoz. 


Az igazi növényevő hal az amur, amelyik képes az elburjánzó vízinövényzet visszaszorítására. Állóvízben nem szaporodik, de egy-egy nagyobb felmelegedő folyóvizünkben van esély a szaporodására. Erről vannak megbízható megfigyelések is. Természetes vizeinkben való túlszaporodása azonban – ami eddig még szerencsére Magyarországon nem fordult elő – hátrányosan befolyásolná az ott élő fajok ökológiai egyensúlyát. 
Több évtizedes kutatások igazolják azt, hogy egy genetikai eljárással, a termékenyített ikra speciális kezelésével, létre lehet hozni olyan amurokat, amelyek az anyától kétszer annyi kromoszómát kapnak, mint az apától.  Ezeket a változatokat triploidoknak nevezik. A triploidok közel olyan jól nőnek, mint normális fajtestvéreik, és azokkal egyezően fogyasztják a vízinövényeket, szaporodásra viszont képtelenek. Az ilyen amurok szakmailag indokolt számú kihelyezésével az öntözőcsatornák, a horgász- és halastavak túlburjánzó vízinövényzete biológiai úton kontrollálható úgy, hogy a kívánatos növényborítottság is megmaradjon. Ma már az Egyesült Államok szinte minden tagállamában csak ilyen triploid amurok kihelyezése engedélyezett. Az engedélyezés pontosan előírt protokoll szerinti hatósági vizsgálat alapján történik.


Egy két és féléves K+F „Intenzív amúrtenyésztési technológia kifejlesztése triploid állományokra” című, és GINOP-2.1.7-15-2016-01630 azonosítójelű 50% támogatású projekt megvalósításával 2017.03.01 - 2019.11.30 között az Aranyponty Zrt telephelyén sikerült olyan technológiai optimalizálást végezni, amelyikkel üzemi méretekben is tudunk gyakorlatilag 100%-ban triploid egyedekből álló utódállományoktat létrehozni, és azokat intenzív módon felnevelni. Ezeknek az állományoknak a ploidia fokát – ami a szaporodóképesség egyik mutatója - egy új módszerrel, a korábbi eljárásokhoz képest sokkal korábban, már embrionális korban is jellemezni tudjuk. A vizekbe kihelyezendő - legalább egynyaras amurokat - vérminta alapján egyenként minősítik.
 

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